Answer: There are so many factors which may/will affect the quality of water
Explanation: such as
i) Acid : it may come from acid rain and etc.....
ii) toxic waste materials : especially from high operating factories
iii) Oil spillage: accidents during oil shipping etc....
iv) littering: dumping of trash and rubbish
v) toxic substances; may come from harmful chemicals which are used in fishing etc... pesticides
vi) bathing and washing in water bodies with animals affects water quality
vii) dumping of waste products into water bodies
viii) mining underground activities
ix) Erosion may also affect water quality
x) leakages: especially in sewage pipes
HOPE THIS HELPSS!!!!!!!!!!!